Do butterflies have brains?

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Tags

1. #thorax
2. #insects
3. #insect
4. #chambered
5. #system
6. #center
7. #other
8. #heart
9. #upper
10. #butterfly
11. #subesophageal
12. #located
13. #butterflies
14. #length
15. #brain
16. #ganglion
17. #nervous